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pt3: fix bug in portamento code

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only noticed with IR.pt3 test

something else is wrong playing that file but it passes validation now
This commit is contained in:
Vince Weaver 2019-06-08 00:48:26 -04:00
parent 26e7d2f990
commit 3186056500
1 changed files with 4 additions and 2 deletions
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6
pt3_player/pt3_lib.s
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@ -1481,13 +1481,15 @@ slide_step_positive1:
sta note_a+NOTE_TONE_SLIDE_STEP_H,X ; 5
dey ; 2
lda (PATTERN_L),Y ; load byte, set as slide_step low ; 5
plp ; 4
plp
clc ; 4
bpl slide_step_positive2 ; 3
;-1
eor #$ff ; 2
adc #$0 ;+carry set by earlier CMP ; 2
sec
slide_step_positive2:
adc #$0 ; 2
sta note_a+NOTE_TONE_SLIDE_STEP_L,X ; 5
bcc skip_step_inc1 ; 3
inc note_a+NOTE_TONE_SLIDE_STEP_H,X ; 7